Light modes: This luminous armband has 3 light modes – white, red, and flashing white and red – for customized visibility and personal preferences. Highly reflective: The luminous armband is highly reflective when exposed to light. Whether you are illuminated by car headlights, streetlights, or other light sources, you will be visible in the dark. When you run, motorists can see you from a distance, which significantly improves safety in the dark. Adjustable size: The length of the armband is freely adjustable, making it easy to wear for both slender and larger arms. You can also adjust the armband to the most comfortable position, depending on your preferences. Rechargeable armband: The running armband has a built-in high-capacity battery with excellent battery life. A full charge provides 2.5 hours of use. A full charge is enough for many night runs, long bike rides, and other activities. Wide use: The running light can be used in a variety of situations, such as running in the dark, walking, cycling, hiking, and so on. It lights up and warns you, ensuring that you can run safely. Show more